Hyundai and Kia Theta II Engine: Metal Shavings in Oil, Recalls and Fixes

Metal shavings in the oil of a Hyundai or Kia with a 2.0 or 2.4 liter Theta II engine usually mean the connecting rod bearings are wearing out. Hyundai and Kia recalled well over a million of these engines in the US for exactly this problem, and the remedy is a free inspection and, where needed, a new engine or short block. If you find shavings, stop driving hard, check your VIN for the recall, and get the engine inspected before it seizes.

Why Theta II Engines Shed Metal

According to the recall filings, two manufacturing problems caused the failures. On 2011 and 2012 Sonatas built at Hyundai’s Alabama plant, metal debris left over from crankshaft machining could restrict oil flow to the connecting rod bearings (NHTSA 15V568). On later engines, machining errors could cause premature bearing wear (NHTSA 17V226, NHTSA 17V224). Either way, the bearing wears, bearing material ends up in the oil, and the engine eventually knocks and can seize.

Recalls That Cover It

NHTSA recall	Vehicles	Units	Remedy
15V568	2011 and 2012 Hyundai Sonata, 2.0L and 2.4L GDI, built at Hyundai Alabama	About 470,000	Inspect; replace short block where needed. Hyundai also extended short block coverage to 10 years or 120,000 miles
17V226	2013 and 2014 Hyundai Sonata and Santa Fe Sport	About 572,000	Inspect; replace short block where needed
17V224	2011 to 2014 Kia Optima, 2012 to 2014 Sorento, 2011 to 2013 Sportage	About 618,160	Inspect; replace engine where needed (Kia SC147)

Sources: NHTSA recall records 15V568, 17V226 and 17V224. Engines replaced under these recalls were later covered by follow up recalls for fuel pipes that could leak after the engine swap (18V934 for Hyundai, 18V907 for Kia), so check those too. Look up your VIN at the NHTSA recall lookup, or call Hyundai at 1-800-633-5151 or Kia at 1-800-333-4542.

Symptoms

• Metallic knocking or ticking from the bottom of the engine that gets faster with rpm
• Oil pressure warning light
• Rising oil consumption between changes
• Glittery metal particles on the dipstick or in drained oil
• Loss of power or stalling, in the worst case an engine seizure

How to Check Your Oil for Metal

1. Park on level ground with the engine warm, then switch it off and wait a few minutes.
2. Pull the dipstick, wipe a drop of oil onto a clean white paper towel and look at it in good light. Fine glitter that catches the light is metal.
3. At the next oil change, look at the drained oil and the filter. Cutting the old filter open shows debris clearly.
4. For a definitive answer, send an oil sample to a lab for analysis. High copper, lead or tin points to bearing wear.

What to Do If You Find Metal

1. Stop hard driving and high rpm right away.
2. Check your VIN for the recalls above. If your car is covered, the dealer inspection and repair are free.
3. Keep your oil change records. Hyundai and Kia may ask for them on warranty and recall claims.
4. If the engine is knocking, avoid driving it far; a seized engine can stall in traffic. Have it towed if the knock is loud or the oil light is on.
5. Use the oil grade your owner manual specifies. Do not switch to a much thicker oil to quiet the knock; it does not fix worn bearings and can hide the problem until it fails.

Many recalled cars also received the Knock Sensor Detection System (KSDS) software update. When it detects vibration consistent with bearing wear, it turns on the check engine light, stores code P1326 and limits engine power. If your light is on, read the code before driving further. A scan tool such as the YOUCANIC UCAN-II Pro reads engine codes on supported models, and a P1326 is strong evidence to bring to the dealer.

If Your Car Is Not Covered

Not every Theta II engine is in these recalls, and coverage depends on VIN, build plant and ownership history. A dealer can still inspect the engine and tell you whether a campaign or warranty extension applies. Outside of coverage, the repair is a short block or engine replacement; a rebuild only makes sense if the crankshaft is not damaged.

Sources

• NHTSA recall 15V568, 2011 to 2012 Hyundai Sonata
• NHTSA recall 17V226, 2013 to 2014 Sonata and Santa Fe Sport
• NHTSA recall 17V224, Kia Optima, Sorento, Sportage

Frequently Asked Questions

How early can Theta II engines fail?

Owners have reported failures at relatively low mileage, which is why the recalls cover inspection regardless of mileage within the recall population.

Will an oil change fix metal shavings?

No. Fresh oil removes the debris that is already circulating, but the bearing is still worn and will keep shedding metal. Use it as a stopgap only until the engine is inspected.

Does the recall cover used cars?

Recalls follow the vehicle, not the owner. Hyundai’s 15V568 filing also states that the 10 year or 120,000 mile short block extension applies to original and subsequent owners.

Related guides: Hyundai Fault Code List DTC · How to Read and Clear Fault Codes on Hyundai with an OBD-II Scanner · How to Read and Clear Fault Codes on Kia

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